Constructing efficient organic photovoltaic devices with a spirobifluorene based water/alcohol-soluble cathode interlayer

Fluorescence-based assays should be feasible in aqueous media for effectively detecting the biological factors. However, numerous sensors have limited signal transductions and low fluorescence quantum yields due to the ingerently reduced excited state energy of fluorophores in aqueous solution, which reduces their sensitivity. This necessitates a smart sensing approach with an amplified fluorescence response for analytes in aqueous solution. Herein, a new building block which self-assembles in aqueous media, giving a micellar sturcuture with the hydrophobic π-extended conjugated system at the core and hydrophilic groups at the periphery, was devised for the first time. We demonstrated that the aggregated fluorophores in a micelle induce amplified fluorescence quenching, in which the excited electron efficiently migrates through π-extended conjugated system in a micelle, as in a polymeric system. Such feature differentiates this sensing approach from the numerous fluorescence-based tools previously developed for sensitive detection. This new system exhibited highly sensitive signal transduction for specific analytes even under actual bioanalytical conditions.

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“…Precursor 2 and amphiphilic building block 1 were prepared in a good yield using the synthetic methods described in the literature 34,35 .…”

Section: Methodsmentioning

confidence: 99%

Micellization-induced amplified fluorescence response for highly sensitive detection of heparin in serum

Jang

Kim

Roh

et al. 2020

Sci Rep

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Water‐Soluble Organic Dyes as Efficient Anode Interlayer Materials for PEDOT:PSS‐Free Inverted Bulk Heterojunction Solar Cells

et al. 2021

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The rising interest in polymer-based organic solar cells (OSCs) over the past decade can be easily explained by the major technological advantages they present over conventional photovoltaics (PVs). For instance, OSCs can be fabricated at a low cost through high productivity roll-to-roll processes, which enables the facile manufacturing of large-area flexible devices. Owing to the development of highly efficient conjugated polymer donors and non-fullerene acceptors, polymeric OSCs now demonstrate certified power conversion efficiencies (PCEs) over 17%. [1] However, further improvements are needed to move from laboratory research to a large diffusion of devices in society. [2] OSCs can be broadly classified into two categories: conventional and inverted architectures. Independent of the device architecture, the OSCs are built by sandwiching the photoactive materials between two electrodes. In both configurations, the addition of cathode and/or anode interlayers (AILs) plays a pivotal role in the enhancement of the device performance due to better energy level alignment and

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PTB7 and PTB7-Th as universal polymers to evaluate materials development aspects of organic solar cells including interfacial layers, new fullerenes, and non-fullerene electron acceptors

2022

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Constructing efficient organic photovoltaic devices with a spirobifluorene based water/alcohol-soluble cathode interlayer

Abstract: Water/alcohol-soluble 3D-structured spirobifluorene based cathode interlayers (CILs) were synthesized and employed to fabricate high performance polymer solar cells (PSCs).

Cited by 3 publications

References 39 publications

Micellization-induced amplified fluorescence response for highly sensitive detection of heparin in serum

Micellization-induced amplified fluorescence response for highly sensitive detection of heparin in serum

Water‐Soluble Organic Dyes as Efficient Anode Interlayer Materials for PEDOT:PSS‐Free Inverted Bulk Heterojunction Solar Cells

PTB7 and PTB7-Th as universal polymers to evaluate materials development aspects of organic solar cells including interfacial layers, new fullerenes, and non-fullerene electron acceptors

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